feat(scopes): add toggling arrows

Author: ramialkawadri

lua/dap-view/scopes/view.lua

@@ -57,7 +57,19 @@ local function show_variables(variables_reference, parent_path, line, depth, can
         local show_expand_hint = #variable.value == 0 and variable.variablesReference > 0
         local value = show_expand_hint and "..." or variable.value
         local variable_name = variable.name
-        local content = variable_name .. " = " .. value
+
+        local path = parent_path .. "." .. variable.name
+
+        local prefix = ""
+        if variable.variablesReference > 0 then
+            if state.variable_path_is_expanded[path] then
+                prefix = "▼ "
+            else
+                prefix = "▶ "
+            end
+        end
+
+        local content = prefix .. variable_name .. " = " .. value
 
         -- Can't have linebreaks with nvim_buf_set_lines
         local trimmed_content = content:gsub("%s+", " ")
@@ -68,8 +80,6 @@ local function show_variables(variables_reference, parent_path, line, depth, can
 
         hl.hl_range("WatchExpr", { line, depth }, { line, depth + #variable.name })
 
-        local path = parent_path .. "." .. variable.name
-
         local prev_variable_value = state.variable_path_to_value[path]
 
         local updated = prev_variable_value and prev_variable_value ~= variable.value